Wrench.



T. W. HARBER.

WRENCH.

APPLICATION FILED MAR.Z2,1907. 904,954, Patented Nov. 24, 19.08.

W M l' a J 2 r u I 'l'l I (I.

I L Harer UNTTE THOMAS W. HARBER, OF SPRINGFIELD, MISSOURI.

Specification of Letters Patent.

Patented Nov. 24, 1908.

Application filed March 22, 1907. Serial No. 363,840.

T all whom it may concern:

| 13 of each of the threadson the shank which Be it known that I, Tnoims \V. Hansen. F is farther away from the fixed jaw or, in

citizen of the United States, residing at Springfield, in the county of Greene and State of Missouri, have invented certain new and useful Improvements in \Vrenches,

of which the following is a specification, reference being bad therein to the accompanying drawing.

This iiwention relates to wrenches of that type in which a sliding adjustable jaw car-' ries a lock-nut having distorted threads for engagement with like threads upon a shank carrying a. rigid jaw.

It has for an object to provide a wrench of this type in which it is possible to secure an adjustment of the sliding jaw to any point between the limits of its adjustment.

Another object is to provide means for preventing the lock nut being turned in the wrong direction.

With these and other objects in view, the invention consists of the parts and combinations of parts hereinafter to be described and more particularly pointed out in the appended claims.

In the drawings, Figure 1 is a side view of the wrench. F ig. 2 is a longitudinal section. Fig. 3 is an edge view. Fig, 42 is a section view of the lock-nut. Fig. is a transverse section of the Wrench through the locknut, showing the nut in locked position. Fig. 6 is a like'view showing the nut in unlocked position.

Referring more particularly to the draw ings, 1 indicates a shank having at one end a rigid jaw 2 which is preferably cast thereon. The other end of the shankcarries a tapered tang 3 upon which is driven a wooden handle 4 which is strengthened at its ends by ferrules 5 and 6 respectively.

Slidablc on the shank 1, is a movable jaw 7 which cooperates with the fixed jaw 2. This slidable jaw '7 carries a pair of tongues or projections 8 which extend into an annular groove 9 on a lock-nut 10thus providing a rotatable connection bet-ween the nut and the sliding aw. The lock-nut 1O surrounds the shank and is adapted tobe interlocked with said shank to hold the adjustable sliding jaw in various positions. This interlocking connection between the lock-nut and the shank comprises quarter segments 11 of screw threads on opposite faces of the shank,

and quarter segments 12 of screw threads at diametric points Within the nut. That end other words, those ends which are adjacent the entrance portions of the grooves between the threads are tapered. The entering ends 14 of the segmental threads within-the nut, are also tapered. By this arrangement, it is impossible for the ends of the threads within the nut to engage the ends of the threads on the shank.

hen the sliding jaw is to be adjusted, the nut is turned so that the threads within the same, are out of engagement with the threads on the shank and lie opposite-the threadless' portions of the shank. After the sliding jaw has been adjusted to the proper position, the nut is turned in the opposite direction and the tapered ends let will enter between the tapered ends 13 of the threads on the shank. It is apparent that the tapered ends of the threads will permit the sliding jaw to be adjusted from one end of its adjustment to the other a distance equal to the thickness of a sheet of paper.

To prevent the lock-nut being turned ii the wrong direction, I rovide a rib 15 connecting the rear ends 0 the threads 12 within the lock-nut. This rib forms a stop to engage the rear ends of the threads on' the shank when the nut is turned in the wrong direction.

Having thus described my invention, what I claim and desire to secure by Letters-Pat ent is:

1. A wrench, comprising a shank, a fixed jaw at one end and a handle at the other, a sliding jaw adjustable on the shank and having a pair of overhanging hooks, a lock nut having an annular transverse flange to engage said hooks, threads extending partially around the end wall of said nut, said threads being connected by a rib, and segmental threads on saitl shank adapted to cooperate with the threads on said nut, the threads of,

said nut andsthc threads of the shank having the same direction of pitch, whereby said threads will when rotated in one direction intermesh, the amount of rotation in said di-- rection being limited by contact.- of said ribs with said segmental threads. 4

' 2. A wrench, comprising a shank, a fixe jaw on one end, a handle on the other, a sliding jaw adjustable on the shank and having a pair of overhanging hooks, a lock nut having an annular transverse flange to' engage said hooks, a series of threads on the eoeeae inner wall of said nut, a longitudinal rib the inner wall of the nut whereby when said integral with and connecting one end of said nutis rotated in the opposite direction, said threads, segmental threads on said shank, outer side will touch the shank'at the other said threads on said nut and said shank havend of said segmental threads and form a 15 ing the same direction of pitch whereby said line of contact. threads on the nut and said shank will, when In testimony whereof I hereunto afix my the nut is rotated in one directioinintermesh, signature in presence of-two witnesses.

the rotation in one direction being limited THOMAS W. HARBER.

by contac'tof said rib with one end of said segmental threads, the outer side of said rib i being smooth and substantially normal to i I Witnesses:

MAYME COFFEY, Tnos. R. GIBSON. 

